255564959 has 4 divisors (see below), whose sum is σ = 275223816. Its totient is φ = 235906104.

The previous prime is 255564889. The next prime is 255564971. The reversal of 255564959 is 959465552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255564959 - 2⁸ = 255564703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255564979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9829409 + ... + 9829434.

It is an arithmetic number, because the mean of its divisors is an integer number (68805954).

Almost surely, 2^255564959 is an apocalyptic number.

255564959 is a deficient number, since it is larger than the sum of its proper divisors (19658857).

255564959 is a wasteful number, since it uses less digits than its factorization.

255564959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19658856.

The product of its digits is 2430000, while the sum is 50.

The square root of 255564959 is about 15986.3991880598. The cubic root of 255564959 is about 634.6005374024.

The spelling of 255564959 in words is "two hundred fifty-five million, five hundred sixty-four thousand, nine hundred fifty-nine".